salary decrease

sir, i am a contract employee in MPSEB. We were recuited as class-2 as per our advertisement and appointed as programmer on fixed pay 30000 with 5% increment. A policy for contract employees has been released in 2016 which states contract employees should be paid equal to a regular cadre employee holding the same post alongwith dearness allowance at that time. Being a class -2 employee, appointed as programmer, we are fixed at 47,250/- i.e. (15600 basic + 5400 grade pay+ da@125%). This scale has been adopted by company for employees appointed as class -2(programmer). But, in 2018, new policy has been introduced. In this policy, programmer has been decremented. They were treated as lowest in class -2 cadre. They were fixed in the scale (9300 basic+ 4800 grade pay+ da applicable). Due to which our salary will decrease to 40 thousand approx if we adopt this. Kindly guide and help us. They say this is government order.